Within the framework of the improved quantum molecular dynamics model, the medium modifications on the free nucleon-nucleon elastic cross sections are investigated. By using various in-medium nucleon-nucleon elastic cross sections in the model, the nucleon-induced reactions on various targets are simulated, and the excitation functions of reaction cross sections in the energy range from 25 MeV to 1 GeV are calculated. By comparing the calculations with the experimental data, an isospin, density, and momentum-dependence medium correction factor on free nucleon-nucleon elastic cross sections is determined.
We studied the properties of proton rich nuclei reported as proton emitters in the region from I to Bi with Z = 53 to 83 and N = 56 to 102 as a crucial application to the existence of exotic nuclei. The effective-field-theory-motivated relativistic mean-field formalism (E-RMF) with NL3, FSUGarnet, G3 and IOPB-I interactions is adopted to analyze the ground state properties of the proton emitters. Furthermore in the E-RMF background, the Wentzel-Karmers-Brillouin (WKB) barrier penetration method is used for the calculation of proton emission half-lives. It is found that the calculated half-lives are in good agreement with the experimental results for all the emitters considered in this study.
Higgs boson production in association with a photon (H+
Atomic Mass Evaluation (AME2016) has replenished the latest data of nuclear binding energy. Other physical observable, such as the separated energies, decay energies and the pairing gaps, were evaluated based on the new mass table. An improved Weizsäcker-Skyrme-type (WS-Type) nuclear mass model with only 13 parameters was presented, including the correction from two combinatorial radial basis functions (RBFs). Where shell and pairing effects are simultaneously dealt with a Strutinsky-like method. 2267 updated experimental binding energies as inputs in RBFs code and their correspondent root-mean square (rms) deviations dropped to 149 keV. For other mass models training by RBFs correction, rms deviations are clustered between 100 to 200 keV. Compared with other experimental quantities, the rms deviations calculated within the improved WS-Type model falls between 100 and 250 keV. We extrapolate the binding energies to 12435 nuclei which covers the range
We study an effective theory beyond the standard model (SM) where either of two additional gauge singlets, a Majorana fermion and a real scalar, constitutes all or some fraction of dark matter. In particular, we focus on the masses of the two singlets in the range of
We investigate the cold nuclear matter (CNM) effects on the productions of the isolated prompt photon and
We report results of a comprehensive global
A future Z-factory will offer the possibility to study rare Z decays
Conserved charge fluctuations can be used to probe the phase structure of the strongly interacting nuclear matter in relativistic heavy-ion collisions. To obtain the characteristic signatures of the conserved charge fluctuations for the QCD phase transition, we perform a detailed study on the susceptibilities of dense quark matter up to 8th order by using an effective QCD based model. We studied two cases, one with the QCD critical end point (CEP) and one without due to an additional vector interaction term. The higher order susceptibilities display rich structures near the CEP and show sign changes as well as large fluctuations. These can provide us information about the presence and location of the CEP. Furthermore, we find that the case without the CEP also show similar sign change pattern, but with relatively smaller magnitude comparing to the case with the CEP. Finally, we conclude that higher order susceptibilities of conserved charge can be used to probe the QCD phase structures in heavy-ion collisions.
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